#include <iostream>
#include <vector>

using namespace std;

int main(){
    int a[4] = {0, 1, 2, 3};
    vector<int> vec(a, a+4);
    cout << *vec.begin()<< endl;
    cout << *(vec.begin())<< endl;
    cout << *vec.begin()+1<< endl;
    cout << *(vec.begin()+1)<< endl;
    return 0;
}